Which cues might cause a plant to respond? clouds covering the sun

sunlight on the other side of a fence

the touch of a horse's tail

all of the above

sunlight on the other side of a fence

Explanation: The phenomena to exhibit a response is called Phototropism. Plants like other autothrops manufacture their own food through the process of photosynthesis, to do this, they need  to water, carbon dioxide, and minerals in the presence of sunlight. Phototropism occurs when plants grow towards  a source of light.

Therefore sunlight on the other side of a fence  is the only cue from the options that can make a plant to respond.

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity